Upload succeeds but "Unknown error" on CodeCov page and no report being generated

[larseggert]

Describe the bug Upload from CI succeeds, but CodeCov website shows "unknown error" and no coverage report is being generated.

Upload step from CI: https://github.com/mozilla/neqo/actions/runs/10920315985/job/30309902324?pr=2116#step:9:114 Report showing the "unknown error": https://app.codecov.io/github/mozilla/neqo/commit/1b5e4613e5c01968983f1e6995ed1566b24ec405

To Reproduce Always seems to happen today.

Expected behavior Expected the upload to be processed.

Screenshots